orga2-simd/filtros/diff_c.c

#include <stdlib.h>
#include <math.h>
#include "../tp2.h"


void diff_c (
	unsigned char *src,
	unsigned char *src_2,
	unsigned char *dst,
	int m,
	int n,
	int src_row_size,
	int src_2_row_size,
	int dst_row_size
) {
	unsigned char (*src_matrix)[src_row_size] = (unsigned char (*)[src_row_size]) src;
	unsigned char (*src_2_matrix)[src_2_row_size] = (unsigned char (*)[src_2_row_size]) src_2;
	unsigned char (*dst_matrix)[dst_row_size] = (unsigned char (*)[dst_row_size]) dst;

	int i,j,val;
	printf("%d %d \n", n,m);

	for(i=0;i<n;i++){
		for(j=0;j<m*4;j+=4){
			val=((src_matrix[i][j+1]-src_2_matrix[i][j+1])+(src_matrix[i][j+2]-src_2_matrix[i][j+2])+(src_matrix[i][j+3]-src_2_matrix[i][j+3])) / 3;
			if (val < 0)
				val=-val;

			dst_matrix[i][j+0]=val;
			dst_matrix[i][j+1]=val;
			dst_matrix[i][j+2]=val;
			dst_matrix[i][j+3]=0;
		}
	}
}